Datasheet

ADP2325 Data Sheet
Rev. A | Page 4 of 32
SPECIFICATIONS
PVIN1 = PVIN2 = 12 V at T
J
= −40°C to +125°C, unless otherwise noted.
Table 1.
Parameters Symbol Test Conditions/Comments Min Typ Max Unit
POWER INPUT (PVINx PINS)
Power Input Voltage Range V
PVIN
4.5 20 V
Quiescent Current (PVIN1 + PVIN2) I
Q
MODE = GND, no switching 3 5 mA
Shutdown Current (PVIN1 + PVIN2) I
SHDN
EN1 = EN2 = GND 30 40 µA
PVINx Undervoltage Lockout Threshold UVLO
PVINx Rising 4.2 4.4 V
PVINx Falling
3.5
3.7
V
FEEDBACK (FBx PINS)
FBx Regulation Voltage
1
V
FB
PVINx = 4.5 V to 20 V 0.594 0.6 0.606 V
FBx Bias Current I
FB
0.01 0.1 µA
ERROR AMPLIFIER (COMPx PINS)
Transconductance g
m
370 500 630 µS
Error Amplifier Source Current
I
SOURCE
40
65
90
µA
Error Amplifier Sink Current I
SINK
45 65 85 µA
INTERNAL REGULATOR (INTVCC PIN)
INTVCC Voltage 4.75 5 5.25 V
Dropout Voltage I
INTVCC
= 30 mA 300 mV
Regulator Current Limit 80 100 120 mA
SWITCH NODE (SWx PINS)
High-Side On Resistance
2
V
BST
to V
SW
= 5 V 48 80 mΩ
High-Side Peak Current Limit R
ILIM
= floating, V
BST
to V
SW
= 5 V 6.4 8 9.6 A
R
ILIM
= 47 kΩ, V
BST
to V
SW
= 5 V 3.4 4.8 6.2 A
Low-Side Negative Current-Limit Threshold
Voltage
3
50 mV
SWx Minimum On Time
3
t
MIN_ON
130 ns
SWx Minimum Off Time
3
t
MIN_OFF
150 ns
LOW-SIDE DRIVER (DLx PINS)
Rising Time
3
t
R
C
DL
= 2.2 nF, see Figure 23 20 ns
Falling Time
3
t
F
C
DL
= 2.2 nF, see Figure 26 10 ns
Sourcing Resistor 4 6 Ω
Sinking Resistor 1.4 3 Ω
OSCILLATOR (RT PIN)
PWM Switching Frequency f
SW
R
OSC
= 100 kΩ 510 600 690 kHz
PWM Frequency Range 250 1200 kHz
SYNCHRONIZATION (SYNC PIN)
SYNC Input SYNC configured as input
Synchronization Range 300 1200 kHz
Minimum On Pulse Width 100 ns
Minimum Off Pulse Width 100 ns
High Threshold 1.3 V
Low Threshold 0.4 V
SYNC Output SYNC configured as output
Frequency on SYNC Pin f
CLKOUT
f
SW
kHz
Positive Pulse Time 100 ns
SOFT START (SSx PINS)
SSx Pin Source Current
I
SS
2.5
3.5
4.5
µA